2024/09/24 by Pulak Banerjee, Banerjee, Pulak, Chinmoy Sankar Dey +5 · 1 citation
Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Experiment (hep-ex) #High Energy Physics - Phenomenology (hep-ph) #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions
paper · pdf · doi:10.48550/arxiv.2409.16375
openalex publication_date 2024/09/24 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
The production of a pair of on-shell Z-bosons is an important process at the Large Hadron Collider. Owing to its large production cross section at the LHC, this process is very useful for SM precision studies, electroweak symmetry breaking sector as well as to unravel the possible new physics. In this work, we have performed the threshold resummation of the large logarithms that arise in the partonic threshold limit z → 1, up to Next-to-Next-to-Leading Logarithmic (NNLL) accuracy. The presence of the two-loop contributions in the process dependent resummation coefficient g0 makes the numerical computation a non-trivial task. After matching the resummed predictions to the Next-to-Next-to-Leading order (NNLO) fixed order results, we present the invariant mass distribution to NNLO+NNLL accuracy in QCD for the current LHC energies. We find that in the high invariant mass region (Q=1 TeV), while the NNLO corrections are as large as 83% with respect to the leading order, the NNLL contribution enhances the cross section by additional few percent, about 4% for 13.6 TeV LHC. In this invariant mass region, the conventional scale uncertainties in the fixed order results get reduced from 3.4% at NNLO to about 2.6% at NNLO+NNLL, and this reduction is expected to be more for higher Q values.